Shuttle ejection mechanism for looms



Oct. 28, 1952 J. BATLLo IBAEZ 2,615,474

SHUTTLE EJECTION MECHANISM FOR LOOMS Filed nec. 19, 1949 9 sx-IEETs-srmm1 figa .1.V BATLLO IBAEZ SHUTTLE EJECTIoN MECHANISM FOR LooMs Oct. 28,1952 Filed Dec. 19, 1949 Patented Oct. 28, 1952 UNITED STATES PATENTSHUTTLE EJECTION MECHANISM LOOMS Fon Juan Batll Ibaez, Barcelona, Spainj v Application December 19, 1949, Serial No. 133,925

In Spain July 26, 1949 v 6 Claims. (Cl. 139-145) the crankdevice,producinga partial rotation of same until said crank passes to theother'sidev of the precedently cited line, at which moment the springactsproducing a rapid turning of the crank, and imparting an impulse tothe pickingstickv or equivalent member of the loom, by any means oftransmission, so that the rotationof wear of the pieces the mechanismbeing of great duration. The power or force of impulsion is obtained atno one instant, but in a gradual manner, .giving great regularity ofstrength and movement yto the loom. This latter canV be started in anyposition of the mechanism, thus greatly facilitating the work for -theworkman.

In the ordinary looms with at or round picking sticks, worked directlyby an excentric or cam any increase or decrease in the speed of theloom, produces a stoppage by the shuttle running back and striking thebattens, in the rst case, or by the shuttle not arriving at theshuttle-box with suiiicient strength or force, in the second case.

The mechanism according to the invention, al- Ways maintains a certaindetermined impulse for the throwing of the shuttle, although the speedof the loom be increased or decreased.

Said mechanism is characterized by comprising on each side of the loom,for the working of the picking stick or the member for theimpulsion ofthe shuttle, a crank, crank shaft or crank disc, to which is coupled theend of a spring of convenient strength, the other end of which is lixedto a lever articulated to any suitable part of the framework of themachine. Said g leasing mechanism actuated by a second rotating cam,said mechanism being constituted by a displaceable member as a lever orsimilar, whichA applies on a projecting part of the crank device, saidsecond cam being inter-related with the rst one in such a way that, whenthey spring has attained the desired strength, and at a convenientmoment, the second cam acts upon the releasing lever which pushes theprojecting part of shuttle.

the crank under ther action of the spring may communicate the impulsion.to the shuttle.

vThe releasing-lever and the buier or vstopblock, may be combined toform a single element that carries out bothfunctions.

When the expulsion of the shuttle hasvtaken. place, the spring remainswithout any tension',

and the picking-stick or other organs of expulsion, go back under thevraction of an auxiliary spring, a counter-weight, etc., which causesthe inverse rotationY of the crank until its projecting part again meetswith the retaining-lever, when the spring begins'` to be again chargedby the Calm'.

This mechanism or movement4 isplaced on each side of the loomv in orderto work the expelling organs on each side. The expulsion of the shuttlewith the mechanism described may be effected by means ofthe knownsystems of at or round picking-stick, coupling these organs to animpulsion shaft or axle, but it also allows of the ldirect action of thepicker that .strikes or impels the shuttle, by means of a cable vor*strap, more or less directly coupled to the Intheaccompanying drawinglis shown,- onlyV as an example, a preferable form of construction ofthe mechanism according to this invention.

Fig. 1 represents the whole of the loom seen from the back, 'showing thegeneral disposition of the mechanism.

Fig. 2 shows with greater detail the group of l organs for working therotary plate crank on each side of the loom.

Fig. 3 represents in vdiagram an arrangement for directly working thepicker that throws or impels the shuttle. v Fig. 4 shows, also indiagram, another arrangement for directly working'the shuttle by meansof a rack and pinion.

Fig. 5 is a graph which represents the value or amount of the impulsionkreceived by the The general view of Figi shows a loom formed by thelateral framework I0 and the posts or OFFICE sY central frames II. Thisloom is provided with a general axle I2 for working the machine and thisaxle transmits its movement by means of the conical pinions I3-I3 orother suitable means, to the axle i4 provided with the two cams orexcentrics I5 and I8 of suitable prcles.`

The cam or excentric I5 (Fig. 2), acts on the central part of the leverIl, provided with the roller I8 and jointed or articulated by one end tothe axle I9, held up by the support 2B of the frame, while the otherendL of the said lever is connected by the point 2I to one end of the.

spring 22 which extends from the said lever to the plate crank 21. Onthis lever being moved or displaced by the action of the excentric, or

cam, the tension of the spring is increased until 1t reaches the maximumand the value oramount of this tension may be varied by placing on theend 2I of the lever, several points orllinks of connection, as well asby moving or displacing bearings 26 and this ax-le carries, solidly xedon to it, the plate Ycrank 2'! which has a :lateral pivot or button 28-to which is fixed the other end of the spring 22. 'The said plate orcrank also has a projecting part or stop 2-9 which yacts `in combinationwith the combined retention and' release lever 30, which is jointed orarticulated on the support 3I xed to the frame, this `lever having anend 32 which applies aga-inst the stop 29, while, the other end 33 isheld against the regulating-screw 34 iixed to the frame, by means .ciwhich may be determined the lextreme limit position of the saidretention lever.

The retention lever is connected by means-of the tie-rod 35 the end ofan elbow-'lever Sii-3'! jointed or articulated onto the axle 38 ixed tothe frame, and the arm 3l of the said lever rests on the second cam orexcentric it, constituting the releasing movement or-mechanism of thespring.

Moreover, the axle A25 is also solidly fixed to the pulley or drum 4Gwhichcarriesa cable belt, band or straprolled round it lwhich isconnected to a picking stick 42 ,of the loom (Fig. l).

This axle is yretained by the retention lever in about the positionyrepresented in Fig. 2, that is withthe button of -the plate slightlybelowthe line determined bythe center of the axle and the point'wherethe spring is iixed tothe lever.

On charging vor augmenting the tensionof .the

spring, by means of the excentric or cam which i `pushes the said lever,the pl-ate 27 has a tendency to turn vin counterclockwise direction,Asaid movement being prevented by the retention lever Y30.

On reachingthe maximum `charging point, the second cam orexcentric i5acts 1 on the elbowlever, by which the end 32 ofthe l.retention klever3U, pushes the ,projecting part 29 andimakes the plate turn slightly,until the'button 23 .passes 4to vthe other side of the said line, .bywhich the spring -22 acts freely, .causing the rapid :rotation of theaxle 25, which gives a strong ijerfkto the picking-stick making itlthrow-or expel the shuttle.

The picking Astick returns to its starting positionrby means of theauxiliary springll, and so, the axle of 'the impulsion `plate turns inthe reverse direction, returning also all the organs to thepositionshown, ready to begin-anew cycle,

4 helped if needed by the action of some kind of spring orcounter-weight, etc.

The rotation of the impulsion-plate attains a variable angle, preferablyof about and this rotation gives the picker an accelerated movement atthe beginning, up to the maximum, and a retarded motion at the nish, asmay be seen in the graphL of .-Fig. 5 and by this -means rough effectsand the resulting impacts or Acollisions are avoided. All this producesgreat regularity in the Working of the loom, the impelling eiort of theshuttle being constant and independent of the variations in speed thatmay occur. Besides this, the releasing motion or mechanism requires onlya minimum of eort and there are no organs or parts that suiier fromfriction or that experience excessive wear, for which reason themechanism is extremely durable and has a long working life.

The mechanism, corresponding to one of the sides of the loom, has nowbeen described, and for the Working of the pickingV stick on the otherside, `a similar mechanism may be provided worked symmetrically byyanother set of cams or excentrics, or else by the same set.

In Fig. 1 is shown the Wholeset of a single group 'ci cams for workingthe mechanisms on both sides. In this case the same cams, besides actingin the form described, also act on the other side upon an auxiliarylever 135 sustained or held by the support mi, this lever beingconnected, by means of the connecting rod 41, with Ythe charging lever48 .of the cam, placed vin a similar symmetrical relationship to that`already described before. The object on this auxiliary lever in themechanism described Ais only to facilitate the crossing and passing ofthe pieces. The `release is arranged and tted in a similar way to thatdescribed above.

This system is very useful for working the picking sticks or other usualexpelling organs, but, besides this, it also allows of very muchsimplifying the construction of a usual loom, lacting directly upon thepicker or `the Shuttle,

In Fig. 3 is shown the arrangement 'of 'the pulley di) iixed on therevolving axle 25 which is connected by means of a cable, strap or band5@ with the picker '51, which being suitably Vguided, may run along theshuttle-box, Ythus throwing or impelling ,the shuttle, completing itbyfthe addition of `an auxiliary spring 52 which pushes the picker backto its starting position.

Another very Simplified arrangement is to fit the shuttle-box with aslidingr or running 4peceti which constitutes or forms the picker ororgan for striking the shuttle and which at the same time carries a barprovided with a rack 56 lwhich isgeared to a cog-wheel 40 xed to thesaid axle 25, so that the rapid turning of the said a-xle causes a rapiddisplacement or movement yof the shuttle, and in consequence, itsforcible expulsion from the shuttle-box.

The foregoing description only refers-to a preferable formofrconstruction of lthe mechanism according to the invention, and it visunderstood that it .may ,be introduced any variations of details such asmeans for varying and'regulating the lengths of `levers or connectingrods, lcon- Y necting points or linksand other, without limitation ofthe scope of the invention.

I claim:

'1. Shuttle ejection mechanism comprising on each side of the loom, arotatably mounted crank device having a crank axle, a spring coupled byone end' to said crank, a pivotally mounted lever,

the other end of said spring being connected to said lever, a generalaxle for said loom, a cam movable by said general axle, said leverimparting tension to said spring, retaining means to maintain the crankagainst the spring action in.

a point located at one side of a line determined by the crank axle andthe end of the tension imparting lever and normally resting the cranknear said line, releasing means adapted for producing a partial rotationof the crank against the spring action until the crank passes to theother side of said line, said crank in said last position being allowedto receive the full action of the spring which imparts a rapid rotatingmovement to the crank axle, said axle in turn acting on the shuttleejection member of the loom.

2. Shuttle ejection mechanism according to claim 1, and having retainingand releasing means combined in one and the same device and consistingof a lever oscillatably mounted on the machine, a stop on said crank, anend of said lever bearing against said stop and acting as a buffer topreventl said crank from turning when the spring is loaded, a stop xedto the framework of the loom, said lever by another point restingagainst said stop xed to the framework Which limits the movement of thelever in one sense, a second cam, a member actuatable by said secondcam, said lever being coupled to said member actuatable by the action ofsaid second cam, which at a suitable moment, acts on the retaining andreleasing lever in a direction that imparts a partial rotation to thecrank leaving it free to be moved by the spring action.

3. A mechanism according to claim 1, and including a drum coupled to thecrank axle, a cable Wound around said drum, said cable being connectedto a picking stick of said loom -used for expelling the shuttle, onrapid turning of the crank axle, this movement being transmitted to thepicker by said cable and the ejection of the shuttle taking place withan accelerated movement at the start, up to the maximum, and retarded atthe finish all dependent on the tension of the spring, and independentof the variations of speed of the loom.

4. A mechanism according to claim 1, and wherein two groups of shuttleejecting means are placed one on each side of the loom, for impellingthe shuttle in both shuttle-boxes, and a single axle and a single pairof cams for actuating both said means, and a symmetrical coupling andlevers interconnecting said cams and said single axle.

5. A mechanism according to claim 1, and including a sliding picker in ashuttle-box of said loom, a cable connecting said crank to said slidingpicker and communicating directly to the said picker the impulsion forexpelling the shuttle, and a spring to return the picker to its startingpoint.

6. A mechanism according to claim 1, and including a sliding member inthe shuttle-box acting as a picker and having an arm with a toothedrack,a gear coacting with said toothed-rack coupled to the crank, so that theturning of said crank causes the displacing of the shuttle, and a springfor pushing back the said sliding member to its starting point.

JUAN BATLL IBAEZ.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 143,257 Ross Sept. 30, 18732,564,383 Trauvetter Aug. 14, 1951

